Cylinder for steam-engines



2 Sheets-Sheet 1.

. G. S. STRONG.

GYLINDER FOR STEAM ENGINES. No. 320,894. Patented June 23, 1885.

J 1 17611.2. i fl (WW firm/WM (No Model.) 2 sneetsslfeet 2.

G. S. STRONG.

CYLINDER FOR STEAM ENGINES.

No. 320,894. Patented June 23, 1885.

N. PEYERS, Fhulu-Lllhngra har. Washinginn. v.0.

UNITED STATES PATENT OFFICE.

GEORGE S. STRONG, OF PHILADELPHIA, PENNSYLVANIA.

CYLINDER FOR STEAM-ENGINES;

SPECIFICATION forming part of Letters Patent No. 320,894, dated June 23, 1885.

Application filed December 1, 1884.

To aZZ whom it may concern.-

Be it known that I, GEORGE S. STRONG, a citizen of the United States, and a resident of Philadelphia, Pennsylvania, have invented certain Improvements in Cylinders for Steam- Engines, of which the following is aspecification.

My invention consists of certain improvements in steam-engines of that class in which two steam-valves and two exhaust-valves are used in connection with one cylinder, my improvements being more especially designed for application to locomotive steam-engines, as described and claimed hereinafter.

In the accompanying drawings, Figure 1, Sheet 1, is a plan view, partly in section, of a locomotive-cylinder made according to my invention; Fig. 2, a vertical section on the line 1 2, Fig. 1; Fig. 3, Sheet 2, a sectional plan on the line 3 4, Fig. 2 and Fig. 4, a vertical section on the line 5 6, Fig. 2, looking in the direction of the arrow.

A is the steam-cylinder,on one side of which is the extension or saddle B, containing the valves and passages, the whole being preferably cast in one piece. 'D D are the steampassages terminating at the inlet a, and G G the exhaust-passages terminating at the discharge-opening b, which is close to the inlet c. There are two ports, f-one near each end of the cylinder-and for each port there are a steam-valve, E, and exhaust-valve F, all the valves being preferably of the gridiron style shown in Figs. 2 and 4. The exhaust-valve F is on one side of the port f, the steam-valve being on the other side, the two valves being preferably arranged at or about the angle shown in respect to each other. The edges of the seat h of each steam-valve E are made in arcs of circles, so as to be fitted to bearings made in corresponding arcs of circles by boring, as described in the application for Letters Patent filed by me November 30, 1884, Serial No. 147,046, the same rule being observed in respect to the seat 6 of each exhaustvalve. Steam-chests may be said to be dispensed with, for the valves are really placed in the passages, the continuation of each steampassage D with the exhaust-passage being in terrupted by the steam and exhaust valves. This arrangement of steam and exhaust valves with the inlet and outlet ports in close rela- (No model.)

tion to each other, and the passages D G forming direct communications between the said openings and the valves, and so dispensing with the steam -chests, forms a compact and convenient construction, which permits the casting containing these passages to be utilized as the saddle, or part of the saddle,for the boiler, and by casting this extension or saddle in one piece with the cylinder, as shown, the whole structure is extremely strong, and the building is greatly simplified and cheapened, as no fitting or facing is needed, and only the cylinder and the seats of the valves have to be bored out. The two exhaust-passages are separated from each other by a partition, w, Fig. 4, so as to prevent a confiictbetween the two volumes of exhaust steam. The portions of the passages devoted to the valves are closed at the bottom by plates m, and at the top by covers (not shown in the drawings) on which are stufiing-boxes for the valve-spindles. The less space between each steam-valve and the adjoining exhaust-valve the better hence the arrangement of the valves at an angle in respect to each other-an arrangement which permits free access of live steam to,and the free passage of exhaust-steam through,the port, while the space between the valves is contracted.

The course of the steam and exhaust passages from the cylinder to the outlets is too clearly shown by dotted lines in Figs. 1 and 4 to need explanation; but these passages may be reversedthat is to say,D D may be the exhaust-passages, and G G the steam-passages, in which case E will be the exhaust-valve, and F the steam-valve.

Although I have described my invention as applied to a locomotive-cylinder, the invention may be adopted in the construction of stationary, marine, or pumping engines.

I claim as my invention-- 1. The combination of the cylinder, having a port, f, a steam-valve on one side thereof, and an exhaust-valve on the other, with the "steam-inlet a and outlet 1), adjacent to each other, and the passages D and G, leadingfrom the port to the said inlet and outlet, substantially as set forth.

2. The combination of the cylinder, having ports f at opposite ends, a steam-valve on one side and an exhaust-valve on the other side of each port, with the steam-inlet a and out- I saddle or extension B, cast in one piece there let 1), adjacent to each other, and the passages with, and containing inlet and exhaust ports D and G, the latter having a, partition, 10, D G, with steam and exhaust valves at both I 5 substantially as described. ends of the cylinder,substantia1ly asset forth. 3. The combination of asteam-cylinder, hav- In testimony whereof I have signed my name ing a port, f, with steam and exhaust passages to this specification in the presence of two sub- D and G, leading from opposite sides thereof, scribing Witnesses. and having valves E F on opposite sides of said port, and at an angle to each other, sub- I GEORGE STRONG stantially as set forth, to bring them close together. I 4. The combination of the cylinder with the Witnesses:

JOHN M. CLAYTON, HARRY SMITH. 

